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19af83d39e
This commit introduces the concept of themeable site settings,
which is a new tool for theme authors that lives alongside theme
modifiers and theme settings. Here is a quick summary:
* Theme settings - These are custom settings used to control UI and functionality within your theme or component and provide configuration options. These cannot change core Discourse functionality.
* Theme modifiers - Allows a theme or a component to modify selected server-side functionality of core Discourse as an alternative to building a plugin.
* Themeable site settings (new) - Allows a theme (not components) to override a small subset of core site settings, which generally control parts of the UI and other minor functionality. This allows themes to have a greater control over the full site experience.
Themeable site settings will be shown for all themes, whether the theme
changes
the value or not, and have a similar UI to custom theme settings.
We are also introducing a new page at
`/admin/config/theme-site-settings` that
allows admins to see all possible themeable site settings, and which
themes
are changing the value from the default.
### Configuration
Theme authors can configure initial values themeable site settings using
a section in the `about.json` file like so:
```json
"theme_site_settings": {
"search_experience": "search_field"
}
```
These values will not change when the theme updates, because we cannot
know if admins have manually changed them.
### Limitations
Themeable site settings are only really intended to control elements of
the UI, and when retrieving their value we require a theme ID, so these
limitations apply:
- Themeable site settings cannot be used in Sidekiq jobs
- Themeable site settings cannot be used in markdown rules
- Themeable site settings will be cached separately to client site
settings using theme ID as a key
- Themeable site settings will override keys on the `siteSettings`
service on the client using the application preloader
- `SiteSetting.client_settings_json` will not include themeable site
settings, instead you can call `SiteSetting.theme_site_settings_json`
with a theme ID
### Initial settings
There are only two site settings that will be themeable to begin with:
* `enable_welcome_banner`
* `search_experience`
And our new Horizon theme will take advantage of both. Over time, more
settings that control elements of the UI will be exposed this way.
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|---|---|---|
| .. | ||
| admin-dashboard.js | ||
| admin-plugin.js | ||
| admin-user.js | ||
| api-key.js | ||
| backup-status.js | ||
| backup.js | ||
| color-scheme-color.js | ||
| color-scheme.js | ||
| email-log.js | ||
| email-preview.js | ||
| email-settings.js | ||
| email-style.js | ||
| email-template.js | ||
| flag-type.js | ||
| form-template.js | ||
| incoming-email.js | ||
| permalink.js | ||
| report.js | ||
| screened-email.js | ||
| screened-ip-address.js | ||
| screened-url.js | ||
| site-setting.js | ||
| site-text.js | ||
| staff-action-log.js | ||
| theme-settings.js | ||
| theme-site-settings.js | ||
| theme.js | ||
| tl3-requirements.js | ||
| user-export.js | ||
| user-field.js | ||
| version-check.js | ||
| watched-word.js | ||
| web-hook.js | ||
